Import wpt@1f9c924a4bf958c8bbd0233c8f0c0faf9251ac96

Using wpt-import in Chromium 5edcf150.

Build: https://ci.chromium.org/buildbot/chromium.infra.cron/wpt-importer/9456

Note to sheriffs: This CL imports external tests and adds
expectations for those tests; if this CL is large and causes
a few new failures, please fix the failures by adding new
lines to TestExpectations rather than reverting. See:
https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md

TBR=foolip

No-Export: true
Change-Id: Iaa1bc72df228516e25226ee08436e55b9ca7eece
Reviewed-on: https://chromium-review.googlesource.com/847281
Commit-Queue: Blink WPT Bot <blink-w3c-test-autoroller@chromium.org>
Reviewed-by: Blink WPT Bot <blink-w3c-test-autoroller@chromium.org>
Cr-Commit-Position: refs/heads/master@{#526531}

third_party/WebKit/LayoutTests/external/wpt/html/browsers/windows/browsing-context-expected.txt

@@ -2,6 +2,5 @@ This is a testharness.js-based test.
 FAIL Check that browsing context has new, ready HTML document assert_equals: The document's encoding should be 'UTF-8'. expected "UTF-8" but got "windows-1252"
 PASS Check that new document nodes extant, empty
 PASS Check the document properties corresponding to the creator browsing context
-PASS Check the history.length of the created browsing context
 Harness: the test ran to completion.
 

third_party/WebKit/LayoutTests/external/wpt/html/browsers/windows/browsing-context.html

@@ -44,11 +44,6 @@
       assert_equals(doc.referrer, document.URL, "The document's referrer should be its creator document's address.");
       assert_equals(iframe.contentWindow.parent.document, document);
     }, "Check the document properties corresponding to the creator browsing context");
-
-    test(function () {
-      assert_equals(iframe.contentWindow.history.length, 1, "The history.length should be 1.");
-    }, "Check the history.length of the created browsing context");
-
     </script>
   </body>
 </html>